Keywords: US Naval Jack 21 stars.svg US Naval jack with 21 stars In use July 4 1819 “July 3 1820 Self created based on code from Image US flag 21 stars svg 2006-10-04 own assumed Dual Freq See also Image US flag 21 stars svg Naval jacks of the United States 38 Flags with more than twenty stars Flags with white five-pointed stars SVG flags - historical of the United States |